Writing data to Yandex Object Storage

In Yandex Query, to write data to Yandex Object Storage buckets, you can use connections or bindings.

Example of writing JSON data using bindings:

INSERT INTO `my_binding`
SELECT
    "value" AS value, "name" AS name
FROM
    $data;

For a list of supported formats and data compression algorithms, see Supported write formats.

Writing data using connectionsWriting data using connections

It is convenient to write data using connections for prototyping and initial setup of data write operations. Before writing data to a bucket, create a connection to Object Storage and use the following SQL statement:

INSERT INTO <connection>.<path>
    WITH
    (
        format='<data_format>',
        compression='<compression_format>'
    )
SELECT
    <expression>
FROM
    <query>

Where:

• <connection>: Name of the connection to Object Storage.
• <path>: Path within the bucket to write data to.
• <query>: Query data source query.

ExampleExample

Sample query to write data to Object Storage using connections:

INSERT INTO `connection`.`test/`
    WITH
    (
        format='csv_with_names'
    )
SELECT
    "value" AS value, "name" AS name

Where:

• connection: Name of the connection to Object Storage.
• test/: Path within the bucket to write data to.

Writing data using bindingsWriting data using bindings

If you need to make data writes on a regular basis, it is handy to use bindings. This helps avoid entering all the details of handling this data in each query. Before writing data to a bucket, create a data binding in Object Storage and use the following SQL statement:

INSERT INTO `<binding>`
SELECT
    <expression>
FROM
    <query>

Where:

• <binding>: Name of a binding to Object Storage data.
• <query>: Query data source query.

ExampleExample

Sample query to write data to Object Storage using bindings:

INSERT INTO `test`
SELECT
    "value" AS value, "name" AS name

Where:

• test: Name of binding to Object Storage data.

Supported write formatsSupported write formats

Currently, the following data write formats are supported:

Query supports the following compression algorithms for data writes:

Parquet file format supports its own internal compression algorithms. Query allows writing data in parquet format using the following compression algorithms: